The key to the diagnosis of early stroke is to emphasize the word “sudden”. Stroke, including cerebral hemorrhage and cerebral ischemia, is caused by the sudden rupture or blockage of cerebral blood vessels, so the clinical manifestations are also sudden. The common symptoms of stroke are: (1) Sudden onset of weakness or inability to move the arms and legs. (2) Sudden onset of numbness on one side of the face or hands and feet, crookedness of the mouth, and drooling. (3) Sudden onset of slurred vomiting or incomprehension of others’ speech. (4) Sudden onset of severe headache, or this headache is different from the usual headache and is persistent. (5) Sudden onset of dizziness, accompanied by unstable walking or falling. (6) Sudden onset of blurred vision/blindness in one or both eyes. (7) Sudden onset of coma. Once the above manifestations appear, you should be sent to a hospital that is equipped to perform thrombolysis and standardized treatment for stroke, and have a head CT or magnetic resonance imaging (MRI) examination immediately. Because time is brain, early diagnosis of stroke and regular treatment can greatly reduce the death and disability rate of stroke.